Locking device



March v24, 1959 LOCKING Filed July v. cs-sMlTH DEVICE INVENTOR. MEME' C .S'M/ TH HTTofP/vcy,

United States Patent O z,a1s,66.3. LOCKING'DEVIC,ts-17 Application July 20, 1956, Serial No. 599,127

3 Claims. (Cl. 70-14) This invention relates to a locking device and more specifically to a lock that is particularly intendedfor use on sliding doors, such as those of showcases and the like, and also on sliding glass doors and other similar doors.

An object of this invention is the provision of a locking device which is simple in construction, easy to use and economical to manufacture.

A further object of the invention is to provide such a locking device of a novel and durable construction which facilitates its manufacture and the assembly of the different parts thereof.

Further objects and advantages of this invention will be more clearly understood from the following description and the accompanying drawing in which:

Fig. 1 is a plan view of my improved locking device, showing the same in locking position on a pair of sliding glass doors.

Fig. 2 is a front view of said locking device.

Fig. 3 is a side view of the lock unit.

Fig. 4 is a rear view thereof with the cover plate re moved.

Fig. 5 is a similar view with the locking bar therein in locked position.

Fig. 6 is a view similar to Fig. 4 but showing the lock unit in unlocked position.

As shown in the drawing, the numerals 10--10 denote a pair of sliding glass doors for which my locking device is particularly adapted.

The said locking device includes an elongated locking bar 11 having a hook portion 12 at one end and a series of teeth 13 along a side edge thereof. Thesaid device also includes a lock unit comprising a casing 14 having a bore 15 in which is rotatably mounted a conventional key plug 16 that is adapted to be secured against rotation relatively to the casing by suitable tumblers, not shown, and moved by a key 17 to its locked and unlockedpositions shown, respectively, in Figs. 5 and 6.

The said casing has an arcuate recess 18 in its rear surface adjacent to one side of the bore 15 which provides stop shoulders 18-a-18-a preferably spaced 90 apart.

A notch 19 extends radially from the edge of the recess and allows insertion of a stop pin 20 into a radial hole adjacent the end of the plug 16. The said pin 20 and a ange 16-a on the outer end of the key plug retain said plug against axial movement relatively to the casing, and said pin is engageable with the shoulders 18-a--18-a to limit rotation of the key plug to its locked and unlocked positions.

The rear surface of the casing contains a transverse slot 21 which is of a size to slidably receive the locking bar 11. Said slot is oit-set relatively to the bore 15 so that it intersects only slightly more than one-half of the bore, thus providing a semi-circular recess in the lower side of the slot. The key plug 16 terminates iiush with the bottom of the slot 21, and it will be noted that the recess 1S in the casing extends into the bottom of said slot to accommodate the stop pin 20. A cover 22 is secured to 2,878,663 Patented Mar- 24, 19.59,

the end; .off 111e easinsovsr the slet 211 andthe end of the si sms-f za l 4 isprovided with aneccentric locking stad 2.4. which Projectie: frcmfthe innerY end 0f the Plug, into, the slot 21" and isco-planarwith thelockingbar. The 'said' stud is normally'loatedpin, the recessrin thelower side Qt. theslor-formebrthe 'bore-1.5' and* out ofthe wat of the said locking', ar 'to permit, insertion thereof into the slot 21 without-interference When it is desired to lock a pair of sliding doors, as shown at 10-10, my improved locking device may be used by simply hooking the bar 11 over the edge of the inside door, sliding the said doors to closed position, then inserting the end of said bar into the slot 21 in the casing 14 and sliding the lock unitover and along said bar, until it abuts the edge of the outside door as shown in Fig. 1. They key plug 16 is "then rotated into locked position wherein the locking stud 2&4 will be disposed between the corresponding pair of teeth 13 to lock the bar to the casing, as shown in Fig. 5,A and thereby lock the doors 10-10 in closed position.

I claim:

l. A locking device including an elongated ilat bar having a plurality of teeth along an outer edge thereof and a hook portion at one end for engagement with one of a pair of relatively movable members, a lock unit attachable to said bar and engageable with the other of said members for locking them against relative movement, said lock unit comprising a casing having a bore therein and a slot extending transversely of and intersecting a portion of said bore whereby only one edge of said slot is disposed on a line extending across said bore, said one edge having a recess therein, said slot being adapted to slidably receive said bar with the teeth thereon adjacent said one edge of the slot and therefore extending across the bore and said recess, a key plug mounted to rotate in said bore and having an eccentric locking stud projecting in an axial direction from the inner end thereof into said recess whereby said stud is normally out of the path of said teeth when the key plug is in unlocked position, said locking stud being movable into engagement with said teeth upon rotation of said key plug 'to locked position to thereby secure the lock unit to said bar.

2. A locking device including an elongated at bar having a plurality of teeth along an outer edge thereof and a hook portion at one end for engagement with one of a pair of relatively movable members, a lock unit slidable over said bar and engageable with the other of said members for locking them against relative movement, said lock unit comprising a casing having a bore therethrough and a slot extending transversely of and intersecting a portion of said bore whereby only one edge of said 'slot is disposed on a line extending across said bore and said bore forms a recess in said one edge of the slot, said locking bar being slidable in said slot with the teeth thereon adjacent said one edge and therefore extending across said bore and said recess, a key plug mounted to rotate insaid bore and having an eccentric locking stud projectgipg in an axial direction from the end thereof into said recess whereby said stud is normally out of the path of said teeth when the key plug is in unlocked position, said stud being enagageable with said teeth upon rotation of said key plug to locked position to thereby secure the lock unit to said bar.

3. A locking device including an elongated bar having a hook portion at one end and a series of teeth along an edge thereof, a lock unit including av casing having a bore therein and a slot extending transversely of and intersecting said bore adapted to slidably receive said bar, a key plug mounted to rotate in said bore and terminating substantially ilush with the bottomv of said slot, said casing having an arcuate recess extending thereinto from the bottom of said slot concentrcally of and communicating with said bore, a stop pin projecting radially from said key plug into said recess, tli' ends of said recess forming abutments engageable by said stop pin to .limit rotation of the key plug to its locked and unlocked positions,` the said casing havinga notch therein extending radially from said recess vto the. exterior of said casing and through which said stop pinfis adapted`to be inserted -into said key plug, and a locking stud extending in an axial direction from thcinner endof said key plug into said slot and engageable with the teeth on said bar for locking the lock unit to said bar in different positions.

References Cited in the lc of this patent UNITED STATES PATENTS Tabor July 20, 1909 Teich Mar. 25, 1924 Junkunc Aug. 9, 1927 Jacobi June 19, 1928 Anderson June 28, 1932 White l Dec. 13, 193s Mora Apr. 26, 1949 

